42SiMn - GB /T 17107-1997

Grade	42SiMn
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades And Mechanical Property For Forgings
Classification	Alloy Steel

42SiMn Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.39	1.1	1.1	-	-	-	-	-
Maximum Value	0.45	1.4	1.4	0.035	0.035	0.3	0.3	0.3

• High-quality steel——P≤0.035；S≤0.035；Cu≤0.3；Cr≤0.3；Ni≤0.3
• Extra-quality steel （Suffix A）——P≤0.025；S≤0.025；Cu≤0.25；Cr≤0.3；Ni≤0.3
• Special High-Quality Steel (Suffix E)——P≤0.025；S≤0.015；Cu≤0.25；Cr≤0.3；Ni≤0.3

42SiMn Mechanical Properties

diameter or thickness d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d≤100	Sample Direction: Longitudinal	Tempering	≥785	≥510	≥15	≥45	229~286	≥31
100＜d≤200	Sample Direction: Longitudinal	Tempering	≥735	≥460	≥14	≥35	217~269	≥23
200＜d≤300	Sample Direction: Longitudinal	Tempering	≥685	≥440	≥13	≥30	217~255	≥23
300＜d≤500	Sample Direction: Longitudinal	Tempering	≥635	≥375	≥10	≥28	196~255	≥20

• The forgings must be inspected for mechanical properties after performance heat treatment and before any surface treatment.
• After the samples are removed, no heat treatments that affect the mechanical properties or any processing that influences the test results shall be conducted.
• Mechanical property testing primarily evaluates the material\'s tensile strength, impact resistance, and hardness. When conducting tensile, impact, and hardness tests simultaneously, the hardness value is for reference only. Alternatively, one may choose to perform only one of the tensile, impact, or hardness tests.

Approximate Comparison Table structural alloy steel

China		Germany		France	Russia	United Kingdom
GB	ISC	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	BS EN/BS
35SiMn 42SiMn	A10352 A10422	37MnSi5 46MnSi4	1.5122 1.5121	38MS5 41S7	35СГ 42СГ	(En46)

42SiMn Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	42SiMn A10422
2	GB /T 17107-1997
	42SiMn
3	GB /T 3077-2015
	42SiMn A10422
4	GB /T 3078-2019
	42SiMn
5	JB /T 6396-2006
	42SiMn

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!